Law of variation for low density polyethylene dust explosion with different inert gases

Pang, Lei; Zhao, Yu; Yang, Kai; Zhai, He; Lv, Pengfei; Sun, Siheng

doi:10.1016/j.jlp.2019.01.009

Cited by 30 publications

(3 citation statements)

References 15 publications

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“…Several researchers have studied the flame propagation characteristics of polyethylene dust explosions. For instance, the effects of dust concentration [19][20][21], particle size [19,20] and inert medium [22][23][24] on the flame morphology, front structure and explosion flame propagation velocity of polyethylene dust have been studied. However, the existence of ethylene affects the pyrolysis, volatilization and other dynamic characteristics of polyethylene dust particles to a certain extent, thereby increasing the complexity of the polyethylene dust explosion process.…”

Section: Introductionmentioning

confidence: 99%

Flame Propagation Characteristics of Hybrid Explosion of Ethylene and Polyethylene Mixture under Pressure Accumulation

Yang

et al. 2022

Energies

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In order to study the flame propagation characteristics of a ethylene/polyethylene hybrid explosion under pressure accumulation, a visual pressure-bearing gas/power hybrid-explosion experimental platform was built. The flame propagation characteristics of polyethylene and ethylene/polyethylene hybrid explosions in the closed vessel were analyzed. The results show that the flame brightness, flame front continuity and average flame propagation velocity of polyethylene dust explosion in the closed vessel increased first and then decreased when the polyethylene dust concentration increased. The curve of the flame propagation velocity with time had obvious pulsation characteristics. Adding 1% and 3% ethylene to different concentrations of polyethylene dust significantly improved its explosion flame brightness, flame front continuity and average flame propagation velocity. Moreover, it also improved the fluctuation amplitude of the explosion flame propagation velocity with time curve. The explosion flame of the polyethylene dust and ethylene/polyethylene hybrid mixture included four zones during the propagation process, which were denoted as the unburned zone, preheated zone, premixed flame zone and dust flame zone. The addition of ethylene to polyethylene dust can significantly increase its thickness of premixed flame zone and preheated zone, and the thickness increased when the ethylene concentration increased.

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Section: Introductionmentioning

confidence: 99%

Flame Propagation Characteristics of Hybrid Explosion of Ethylene and Polyethylene Mixture under Pressure Accumulation

Yang

et al. 2022

Energies

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“…Secondly, it will cause pollution to the surrounding operation environment and a negative impact on subsequent processing. Moreover, the static electricity generated during the transportation of particles could cause fire in the dust clouds of conveying pipeline or packaging systems, which is a potential safety hazards [3,4]. Therefore, in consideration of safety and economy, the fine dust contained in LDPE should be purified and eliminated.…”

Section: Introductionmentioning

confidence: 99%

An Experimental Study on Performance and Structural Improvements of a Novel Elutriator

et al. 2021

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During the transportation and packaging of low density polyethylene (LDPE) granular materials, fine dusts such as floccules, powder and fiber will be produced, which pollute the environment, affect product quality and generate fire hazards. In this work, the separation performance of fine dust and optimal operating conditions of an improved elutriator were investigated experimentally. Experiments were carried out to investigate the effects of air speed, feeding speed, and grid layout on the removal efficiency of fine particles. Experimental data showed that the separation efficiency of the novel elutriator ranged from 96% to 98.50%, which was more stable and an average of 51.44% higher than that of the original elutriator. By setting internals and improving the structure, the gas flow field in the equipment was regulated, the particle dispersion was intensified, and the static electricity was eliminated, which significantly improved the separation efficiency of fine dust.

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“…7 The explosion hazard of ABS dust is great, so it is very necessary to investigate the explosion suppression of ABS dust. Many scholars have conducted a lot of research on dust explosion suppression, [8][9][10][11] but there is not much research on explosion suppression of ABS dust.…”

Section: Introductionmentioning

confidence: 99%

Investigation on suppression of melamine polyphosphate on acrylonitrile‐butadiene‐styrene dust explosion

Song

Luo

et al. 2021

Process Safety Progress

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There is a possibility of dust explosion during acrylonitrile-butadiene-styrene (ABS) production including cutting, grinding and machining. The suppression effect of melamine polyphosphate (MPP) on the explosion severity and ignition sensitivity of ABS dust, including maximum explosion pressure (P max ), maximum explosion index (K st ), minimum ignition energy (MIE) and minimum ignition temperature (MIT), was systematically investigated. MPP had an inhibitory effect on ABS dust explosion, and the explosion suppression effect was proportional to the mass fraction of MPP. Through the analysis on thermal decomposition behavior, gas-phase products and the explosion residue, the explosion suppression mechanism of MPP on the ABS dust was studied and proposed. According to the thermal analysis and explosion residue analysis results, it could be seen that the addition of MPP improved the thermal stability of the ABS dust and promoted the formation of dense carbon on the surface of ABS particles. Gas-phase products results showed that thermal decomposition of MPP produced NH 3 , CO 2 and H 2 O, which consumed and diluted the oxygen concentration in the explosion zone.

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Law of variation for low density polyethylene dust explosion with different inert gases

Cited by 30 publications

References 15 publications

Flame Propagation Characteristics of Hybrid Explosion of Ethylene and Polyethylene Mixture under Pressure Accumulation

Flame Propagation Characteristics of Hybrid Explosion of Ethylene and Polyethylene Mixture under Pressure Accumulation

An Experimental Study on Performance and Structural Improvements of a Novel Elutriator

Investigation on suppression of melamine polyphosphate on acrylonitrile‐butadiene‐styrene dust explosion

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